Open Source UAV Airframe

Hi the idea here is to come up with a new UAV specific airframe design for the DIY community. Seeing that the AP's are rapidly improving and are cost effective for DIY we have no Airframe to match. We need something with Ailerons to start with, its the only way to fly properly and prevent nasties. A Pod design may be the most flexible as they can be interchanged, also if positioned at the CG it will help to keep the airframe light and reduce CG problems with differing Pods/Payloads.We need some new standards for form factor for the AP and Payload to ease the pain of design and prevent the issues with adapting other designs. To start the ball rolling a few ideas below:UAV specific design, long term platformCost effective, not cheapAirframe with Rx, AP, BattPod for payload/AP (Interchangeable for different missions/payloads) with own powerPod design to form factor & Volume (maybe different Pod designs for same Airframe)New AP form factor (standardization) for mounting and space utilizationRequirements:Max PayloadMax weight to conform to legislation, also max speedDuration, batt size & motorAirframe weight (lower means more payload)SturdinessCGStabilityPod vibration isolationSensor vibration isolationSensor mounting points on airframe with wire pathways to ease installation & attachmentPod electrical connector or means to electrically connect to AirframePitot tube and/or AoA sensor build in, baro sensor positionWheeled or notLand and stall speedGimball for camera and other sensorsRgrdsSarel

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johannes October 13, 2009 at 7:09pm

hi all,

i would like to have these as airframe ;)
could ArduPilot handle that?

cheerz

gtultralights.com

This domain may be for sale!
Cronselaar October 11, 2009 at 3:44pm

Hallo all

So, i've officially started my design... No pre-designing. All I know is that it'll have to be a pusher, and a big one at that.
Here are some pics of me testing the newly built cnc. UAV got prefrence as i have no other planes at the moment(bad crash month).. Perfectly cut cores(First time cut).. Yummy!

Clark Y airfoils(Best all rounder in my opinion for slow, high lift UAV)
root & tip cord 280mm
Span at the mo. 2.1 m total(stil need to trim and glue, and re-inforce)

Happy building all!
Eye-in-the-sky October 9, 2009 at 2:11am

The owner of Maja recommended this motor:

Brushless Outrunner motor PULSAR 20 is suitable for model airplanes with flying weight of 1200 ~ 1800g * It can deliver comparable performance to a .25 size glow engine * mounting hardware and propelleradapter supplied as standard for fast and easy installation * 7~10 cells * 2~4 LiPO * Measures: 35x36mm * IO (A): 2.0A (10V) * KV/RPM-V: 980 * max. load 28A/60sec. * max. Efficiency: 80% * resistance: 45mOhm * shaft dia: 4mm * weight: 105g * We recommend a 35A brushless controller, e.c. PULSAR PRO 35-3P, No.C1511
Mike October 8, 2009 at 11:42pm

More info and pics of the Maja here:

http://www.rcgroups.com/forums/showthread.php?t=1095996

A guy is about to maiden his new build within the week....worth following.
Eye-in-the-sky October 8, 2009 at 9:17am

Also look at this link. It is being built as an FPV.

http://fpv-community.com/forum/printthread.php?tid=70
Eye-in-the-sky October 8, 2009 at 9:12am

The Maja is German and like their cars, not cheap but well designed.

Take a look: http://www.borjet.de/xtc/product_info.php?info=p31_MAJA-Traegersyst...
James Harwood October 8, 2009 at 9:00am

Check out this platform - Really cool design maybe some of its elements can be used.

http://www.elbitsystems.com/lobmainpage.asp?id=764
Eye-in-the-sky October 8, 2009 at 6:30am

Or a variant of this robust work horse? Not pretty but functional.

1.8m wingspan and 1.4m fuselage. 1.5kg payload.

Comments please.
James Harwood October 8, 2009 at 1:49am

Hello - I am very new to the DIYdrones community, and when scanning the forums this post caught my eye.
I am very interested in helping with this project and learning anything I can along the way.

I know many of you may have seen the platform in this thread -

http://diydrones.com/profiles/blogs/questions-about-piloting-my

It is the Hawk Eye platform for Aerial Photography. What do you think about that design? What are the advantages and disadvantages?
Cronselaar October 5, 2009 at 12:17pm

So? Any designs that someone would like to see cnc cut?

I do have a question on airfoils.. What type should we use? high speed or high lift? tapered or not? Will using the high lift foil have to much a drag penalty on a UAV or is the speed range of a typical small photography UAV better suited for a nice slow speed & high lift?

Practical knowledge will be greatly appreciated.

Happy drafting!

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